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Grzybiarz is a mobile app for mushroom foragers. Its on-device AI helps you spot fruiting bodies in the leaf litter and suggests a species from a photo, and the app keeps a private map of your finds. Everything runs on your phone and works fully offline in the forest without signal.

Eastern American jack-o'-lanternOmphalotus illudens

toxic

Eastern American jack-o'-lanternOmphalotus illudens

Photo: (c) Alex Abair, some rights reserved (CC BY)

Habitat

deciduous forests

under oaks

beech forests

Season

from July to October

Omphalotaceae

4–18 cm

Season

Out of seasonOut of season. It usually grows from mid-July to mid-October.

Today · 22–28 Octout of season

how often reportedpeak

Season

Jul–Oct

Peak

Aug–Sep

Reports

–estimate

Risk window

Chanterelle grows at the same time

Both species grow together for about 17 wk a year. Most strongly from early August to mid-September.

Boczniak ostrygowatyIn the forest together about 4 wk a year.

Too few observations for a curve. The season shape is an estimate from the atlas months.

Key features

Cap bright orange to salmon, fleshy, smooth, funnel-shaped with age. Spore-bearing surface of crowded, sharp, true gills (NOT ridges) running down the stem, bioluminescent in the dark; grows in clusters on stumps of deciduous trees, whereas the Golden Chanterelle grows on the ground and does not form fused clusters.

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